220157721

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{449}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 374774400

約数和(自身を除く): 154616679

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 181, 301, 387, 449, 543, 903, 1267, 1347, 1629, 2709, 3143, 3801, 4041, 7783, 9429, 11403, 19307, 23349, 28287, 54481, 57921, 70047, 81269, 135149, 163443, 173763, 243807, 405447, 490329, 568883, 731421, 1216341, 1706649, 3494567, 5119947, 10483701, 24461969, 31451103, 73385907, 220157721]

約数ペア:

[(1, 220157721), (3, 73385907), (7, 31451103), (9, 24461969), (21, 10483701), (43, 5119947), (63, 3494567), (129, 1706649), (181, 1216341), (301, 731421), (387, 568883), (449, 490329), (543, 405447), (903, 243807), (1267, 173763), (1347, 163443), (1629, 135149), (2709, 81269), (3143, 70047), (3801, 57921), (4041, 54481), (7783, 28287), (9429, 23349), (11403, 19307)]